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Finding the Fourth Proportional to 126,142.68, 174,076.38 and 69,555

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Solution

The fourth proportional to 126,142.68, 174,076.38 and 69,555 is: 95,985.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,142.68 : 174,076.38 = 69,555 : x
  2. Step 2: Convert to fraction form
    126,142.68/174,076.38 = 69,555/x
  3. Step 3: Cross multiply
    126,142.68x = 174,076.38 × 69,555
  4. Step 4: Simplify right side
    126,142.68x = 12,107,882,610.90
  5. Step 5: Solve for x
    x = 12,107,882,610.90/126,142.68
  6. Step 6: Final answer
    x = 95,985.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.